CVE-2025-59559 identifies a Missing Authorization vulnerability (CWE-862) in the Payrexx Payment Gateway plugin for WooCommerce, affecting versions up to 3.1.5. This vulnerability arises from improperly configured access control mechanisms within the plugin, allowing users with limited privileges (requiring at least some level of authentication) to perform actions or access resources that should be restricted. Specifically, the flaw allows exploitation of incorrect access control security levels, meaning that certain operations or data that should be protected by authorization checks are accessible without proper permission validation. The vulnerability does not require user interaction beyond authentication, and it can be exploited remotely over the network (AV:N), with low attack complexity (AC:L). The impact is limited to integrity loss (I:L), with no direct confidentiality or availability impact. No known exploits are currently reported in the wild, and no patches have been linked yet. Given the plugin’s role in handling payment transactions within WooCommerce, unauthorized actions could potentially manipulate payment processing workflows, alter transaction data, or interfere with order management, leading to financial discrepancies or fraudulent activities. The vulnerability’s medium severity rating (CVSS 4.3) reflects moderate risk, primarily due to the requirement of some privilege level and the limited scope of impact.

For European organizations using WooCommerce with the Payrexx Payment Gateway plugin, this vulnerability poses a risk to the integrity of payment processing and order management systems. Attackers with authenticated access—such as compromised user accounts or insider threats—could exploit this flaw to manipulate transaction data, potentially causing financial losses, accounting errors, or fraudulent orders. This could undermine customer trust and lead to regulatory scrutiny under GDPR if transaction data integrity is compromised. Additionally, ecommerce businesses in Europe rely heavily on WooCommerce and payment gateways for revenue; disruption or manipulation of payment workflows could impact business continuity and reputation. While confidentiality and availability impacts are not evident, integrity violations in payment systems are critical due to their financial implications. The lack of known exploits currently reduces immediate risk, but the presence of this vulnerability in a widely used ecommerce plugin warrants prompt attention.

European organizations should take the following specific steps: 1) Immediately audit user roles and permissions within WooCommerce and Payrexx Payment Gateway to ensure minimal privilege principles are enforced, limiting access to payment gateway management features only to trusted administrators. 2) Monitor logs for unusual activities related to payment processing or order modifications that could indicate exploitation attempts. 3) Engage with the Payrexx vendor and WooCommerce plugin maintainers to obtain or request a security patch addressing this missing authorization issue; apply patches promptly once available. 4) Implement additional compensating controls such as multi-factor authentication (MFA) for all users with access to payment gateway configurations to reduce risk of account compromise. 5) Conduct regular security assessments and penetration tests focusing on access control mechanisms within ecommerce platforms. 6) Consider deploying web application firewalls (WAF) with custom rules to detect and block anomalous requests targeting payment gateway endpoints until a patch is applied.